Physics - December 2006

a 150kg football player has a velocity of 5m/s

2006-12-04 12:11:41 · 4 answers · asked by foxy lady 2

or, did it?

2006-12-04 12:05:25 · 7 answers · asked by suka 1

2006-12-04 12:01:52 · 5 answers · asked by queenb_b4u 1

this is for class, so no silly answers please.

2006-12-04 11:56:38 · 4 answers · asked by rst5566 2

Calculate the net torque (magnitude and direction) on the beam in Figure P8.3 about the following axes.
http://www.webassign.net/sercp/p8-3.gif
figure 8.3 is above

(a) an axis through O, perpendicular to the page
(b) an axis through C, perpendicular to the page

2006-12-04 11:42:26 · 1 answers · asked by itsosheen 2

2006-12-04 11:33:34 · 5 answers · asked by TyMill 1

The question also adds that the amount dfference must also be specified. There is also a hint to allow the unstretched spring to be L1 and the stretched spring with the mass to be L2.

2006-12-04 11:29:29 · 1 answers · asked by Justin F 1

2006-12-04 11:27:34 · 2 answers · asked by Gideon 1

If it takes 1.2 seconds for a projectile to reach its highest point, does it then take 2.4 seconds to return to the ground?

2006-12-04 11:15:33 · 5 answers · asked by chrislax352 2

What would be a good, quick way to explain why the slope of a pressure vs time graph of experimental data of a sample of gas at constant volume should lead to an x-intercept of -273.15?

2006-12-04 11:05:43 · 1 answers · asked by dopplerjeff5000 2

I did the experiment using the string, salt, and ice. The ice did attach to the string, showing that the ice re-froze. But salt also melt ice, how can the ice re-froze in the experiment?

2006-12-04 10:53:26 · 1 answers · asked by Sunshine Laserwing 2

Okay, so I have this physics problem that I can't quite lay my finger on, and it includes nanoCoulombs. Usually when we do problems like this we use microCoulombs which is # x 10^ -6. But our instructor did not tell us what nanoCoulmbs is, would it be # x 10^ -8?

BTW. The question is..

Two point charges of magnitude 9nC and -2 nC are separated by 31.5cm. The Coulomb constant is 8.99755 x 10^9 Nm^2/C^2.
What is the potential difference between a point infinitely far away and a point midway between the charges? Answer in units of V.

If you can't solve it, knowing the scientific notation of nC would be VERY helpful.

Thank you. :]

2006-12-04 10:49:36 · 3 answers · asked by lovely x lucie 2

thank you so much here are the questions

1). on earth, why does an object of a large mass weigh more the an object of a smaller mass?

2). explain why gravity does not cause a falling object of a large mass to accelerate at a faster rate than a falling object of a smaller mass.

3). if the forces inn an action-reaction pair are equal in size and opposite in direction, why arent' they balanced forces?

4). Explain why a marble moves in a straigh line as it rolls across the table but fallows a curved path once it rolls off the table

thank you so much...if you need any help on anything just e-mail me at askme_ne_thing@yahoo.com

2006-12-04 10:41:52 · 6 answers · asked by Haley 3

If the period of a wave increases, its frequency must____________.

A. double
B. decrease
C. increase
D. stay the same

I think it is C, but I need another opinion. Please help! ^^

2006-12-04 10:37:37 · 7 answers · asked by Lizzie 5

In 9.4 s a fisherman winds 2.0 m of fishing line onto a reel whose radius is 3.0 cm (assumed to be constant as an approximation). The line is being reeled in at a constant speed. Determine the angular speed of the reel

The correct answer to this is 7.09 rad/s but I have no idea how to arrive at this. Any help would be appreciated.

2006-12-04 10:35:18 · 3 answers · asked by larkinfan11 3

a) is opposite to the charge on the charging object
b) is proportional to the size of the object being charged
c) is permanent
d) is the same as the charge on the charging object
e) is inversely proportional to the size of the object being charged.

2006-12-04 10:29:28 · 1 answers · asked by .·´¯`·-> вавіі-ѕнаz <-·´¯` 2

a) becomes negatively charged
b) is repelled by the rod and the attracted to the rod
c) is attracted to the rod and remains attracted to the rod
d) is attracted to the rod and then repelled by the rod
e) remains hanging by a thread motionless and unaffected by the rod

2006-12-04 10:25:47 · 1 answers · asked by .·´¯`·-> вавіі-ѕнаz <-·´¯` 2

If a sphere 20 feet in diameter enclosed a vacuum and weighed 300 lb. What amazing property would it possess?

2006-12-04 10:17:38 · 3 answers · asked by Chris H 2

A 64.0-kg person, running horizontally with a velocity of +3.76 m/s, jumps onto a 10.8-kg sled that is initially at rest.

(a) Ignoring the effects of friction during the collision, find the velocity of the sled and person as they move away.

b) The sled and person coast 30.0 m on level snow before coming to rest. What is the coefficient of kinetic friction between the sled and the snow?

2006-12-04 09:59:21 · 3 answers · asked by Anonymous

im doin a project and i need answers from ppl who KNOW!!! asap!


1.examples to when law applies to everyday situations

2.how does the law relate to forces??

if u get it from a website that would b great if u gave me it to!!!!!!

2006-12-04 09:58:16 · 1 answers · asked by Team Jacob :) ||kiki♥|| 3

this is due tomorrow...where can i start/a step by step solution would be great...

http://img74.imageshack.us/my.php?image=img012brz6.jpg

way too hard

2006-12-04 09:40:25 · 1 answers · asked by Anonymous

2006-12-04 09:40:00 · 3 answers · asked by Anonymous

2006-12-04 09:35:13 · 4 answers · asked by Anonymous

im sure there is a way to determine how much energy is needed to move a body of mass. id like to know how much is need to shift a sphere with a mass of 5.9742×10^24 kg, assuming that there is no wind, gravity, or any other force that could cause friction. anyone know how i can come to an answer?

2006-12-04 09:31:54 · 2 answers · asked by Anonymous

2006-12-04 09:04:21 · 2 answers · asked by Dustin w 1

Physics Question =]?
A 10.0 kg crate is pushed up a 15 deg. incline with an initial speed of 1.5 m/s. The force pulling the crate is 100,0 N and is parallel to the surface of the incline. Assuming the coefficient of kinetci friction is 0.40 and the crate is pulled a distance of 7.5 m find the following:

a.) The work done by gravity


I know you don't need all that info for that but you did for parts b,c, and d which are not shown because I solved them already

Haha..sorry I accidentally posted this in the hockey section.

2006-12-04 08:25:00 · 1 answers · asked by classicrockrox 3

2006-12-04 08:24:48 · 19 answers · asked by robzi 1

2006-12-04 07:40:38 · 10 answers · asked by Anonymous

An object of mass (m) is traveling on a horizontal surface. There is a coefficient of kinetic friction (u) between the object and the surface. The object has speed (v) when it reaches x=0 and encounters a spring. The object compresses the spring, stops, and then recoils and travels in the opposite direction. When the object reaches x=0 on its return trip, it stops.

Find (k), the spring constant.
Express (k) in terms of (u), (m), (v), and (g).

2006-12-04 07:31:20 · 2 answers · asked by Mich W 1

A silly 'pub' argument.

A bullet fired from a gun exactly horizontally will hit the ground at exactly the same time as a bullet dropped from the same height as the gun barrel.

My friend maintains the force of gravity being the same on both objects they will hit the ground simultaneously.

I maintain that although this is true in a 'no atmosphere' situation, where there is an atmosphere the fired bullet is effectively 'flying'; and will hit the ground long after the dropped bullet.

Which of us is right?

2006-12-04 07:17:49 · 27 answers · asked by DavidP 3